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Finding the Fourth Proportional to 544.51, 813.62 and 389.60

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Solution

The fourth proportional to 544.51, 813.62 and 389.60 is: 582.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.51 : 813.62 = 389.60 : x
  2. Step 2: Convert to fraction form
    544.51/813.62 = 389.60/x
  3. Step 3: Cross multiply
    544.51x = 813.62 × 389.60
  4. Step 4: Simplify right side
    544.51x = 316,986.35
  5. Step 5: Solve for x
    x = 316,986.35/544.51
  6. Step 6: Final answer
    x = 582.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.